YOU know YOUR cooker. If you are pretty sure it will work, do it. If you know your cooker needs any attention whatsoever, don't do it.
It's as easy as that.
Personally, i'd have tried to do a practice run a couple weeks ago - do a bird while you're at home, pretending that you are gone and don't touch a thing. See what happens over the course of your work day and if it worked then, it's easy. If not, don't do it.
I realize that this information is nearly useless now...
Cat Daddy's BBQ : 22.5 WSM / PBC / Weber OTG 22.5 Cajun Bandit / Smokey Joe Gold